Thanks to instrumentation advances (VLT/SPHERE, VLT/MUSE, LBT/LBTI, Magellan/MagAO; [1]}, [2]}, [3]}, [4]}, [5]}),
a handful of low-mass companions to young stars have been
detected and explored that (possibly) show signs
of ongoing accretion: LkCa 15 b ([6]}; but see also [7]}, [8]}), PDS 70 b and c [9]}, [10]}, [11]}, [12]}, [13]}, and Delorme 1 (AB)b [14]}.
On the other hand,
recent surveys searching for further accreting planets through their H \(\alpha \)  signal have returned null results,
from five [15]} and eleven [16]} different sources[16]}
do not include PDS 70 in order to analyse the known planets in that system separately. (see also [18]}).
